4-7 psi cap for Griffin radiator?

[51 MERC-CT]

Originally Posted by flathead 39

I Just discovered a cooolant leak in one head gasket. I have a Griffin radiator with griffin cap. I dont know the psi rating of the cap but their web site does not offer a low pressure cap. Anybody know what kind of lower pressure cap I can use on the Griffin. No return tank.

The high pressure caps they offer are because their radiators will tolerate those pressures without expanding.
Why don't you call Griffin and explain to them what you want to do?
Perhaps they know of a source for a cap that will fit their configuration.